sanspie
515f4ca1b3
Clips (.aeanim) and controllers (.aectrl) with importers, AnimationPlayer and Animator with crossfades, root motion and events on fixed steps, rewind support. Editor: Animation panel (dope sheet, curves, record, preview, trajectory), Animator panel, sprite sheet slicer and flipbooks, Programming workspace, export panel redesign. Motion 2D ledge climb. 11c: the component and Create palette.
60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
//go:build aego_golden
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package golden
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import (
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"testing"
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"aego/core/mathx"
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"aego/gpu"
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"aego/render/sprite"
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"aego/render/view"
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)
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// A sprite tinted #00000000 is transparent black: it leaves no pixel, whatever its blend mode.
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func TestZeroTintDrawsNothing(t *testing.T) {
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s := paletteSession(t)
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e := s.Engine
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const w, h = 64, 64
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draw := func(tint mathx.Color) []byte {
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t.Helper()
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tgt, err := e.GPU().CreateTexture(gpu.TextureDesc{Width: w, Height: h, Format: gpu.TexRGBA8, Label: "golden.tint"})
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if err != nil {
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t.Fatal(err)
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}
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frame := e.GPU().BeginFrame(w, h)
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if err := s.Renderer.BeginFrame(frame, w, h, 1); err != nil {
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t.Fatal(err)
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}
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v := view.ScreenView(w, h, 1)
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v.Target, v.Clear, v.DoClear, v.Label = tgt, mathx.Color{A: 1}, true, "golden.tint"
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f := s.Renderer.View(v)
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for i, blend := range []sprite.BlendMode{sprite.BlendPremultiplied, sprite.BlendAdditive} {
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f.Sprite(sprite.Draw{Region: s.Renderer.White(), Position: mathx.Vec2{X: float32(8 + i*28), Y: 8}, Size: mathx.Vec2{X: 24, Y: 48}, Tint: tint, Blend: blend})
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}
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f.End()
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s.Renderer.EndFrame()
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e.GPU().EndFrame()
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buf := make([]byte, w*h*4)
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if err := e.GPU().ReadPixels(tgt, 0, 0, w, h, buf); err != nil {
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t.Fatal(err)
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}
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return buf
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}
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lit := func(buf []byte) int {
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n := 0
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for i := 0; i < len(buf); i += 4 {
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if buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0 {
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n++
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}
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}
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return n
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}
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if n := lit(draw(mathx.Color{R: 1, G: 1, B: 1, A: 1})); n == 0 {
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t.Fatal("a white sprite drew nothing; the test does not reach the screen")
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}
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if n := lit(draw(mathx.Color{})); n != 0 {
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t.Fatalf("a #00000000 sprite lit %d pixels", n)
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}
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}
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